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$809+ Cheap flights from Islip, NY (ISP) to London (LON)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LON
Aug 2 — Aug 91
Sun 8/2
Sun 8/9
1 adult, Economy
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Cheap flight deals from Islip to London

Cheapest flights from Islip to London
Explore the most affordable flight options available from Islip to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2026.

This Norse deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1710:57 am
ISP
-
LGW
1 stop18h 03m
Multiple Airlines
Mon 8/242:00 pm
LGW
-
ISP
1 stop24h 53m
Multiple Airlines
Deal found 7/3$809
This Kiwi.com deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/115:27 pm
ISP
-
LGW
2 stops35h 33m
Multiple Airlines
Tue 8/182:00 pm
LGW
-
ISP
1 stop24h 53m
Multiple Airlines
Deal found 7/1$823
This Kiwi.com deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2710:57 am
ISP
-
LGW
1 stop18h 03m
Multiple Airlines
Mon 8/32:00 pm
LGW
-
ISP
2 stops28h 42m
Multiple Airlines
Deal found 6/29$996
This FlightHub deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/274:48 pm
ISP
-
LGW
2 stops35h 47m
JetBlue
Mon 8/312:20 pm
LGW
-
ISP
2 stops38h 24m
JetBlue
Deal found 6/29$1,115
This FlightHub deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/36:00 am
ISP
-
LHR
2 stops19h 30m
JetBlue
Tue 8/48:40 am
LHR
-
ISP
2 stops31h 00m
JetBlue
Deal found 6/30$1,173
This FlightHub deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/266:00 am
ISP
-
LHR
2 stops43h 30m
JetBlue
Sun 8/28:40 am
LHR
-
ISP
2 stops56h 58m
JetBlue
Deal found 6/28$1,223
This FlightHub deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/182:00 pm
ISP
-
LHR
2 stops49h 45m
JetBlue
Fri 10/238:40 am
LHR
-
ISP
2 stops33h 25m
JetBlue
Deal found 7/3$1,262
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/172:16 pm
ISP
-
LHR
1 stop11h 29m
Multiple Airlines
Mon 8/249:25 pm
LHR
-
ISP
2 stops41h 28m
Multiple Airlines
Deal found 7/3$1,295
This FlightHub deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/73:07 pm
ISP
-
LHR
2 stops37h 23m
JetBlue
Tue 7/148:15 am
LHR
-
ISP
2 stops31h 26m
JetBlue
Deal found 7/2$1,447
This Expedia deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/111:35 pm
ISP
-
LHR
2 stops25h 45m
Multiple Airlines
Tue 8/182:20 pm
LHR
-
ISP
2 stops38h 08m
Multiple Airlines
Deal found 6/29$1,492
This Orbitz deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2711:31 am
ISP
-
LHR
2 stops20h 59m
Multiple Airlines
Mon 8/37:40 am
LHR
-
ISP
2 stops21h 13m
Multiple Airlines
Deal found 6/29$1,523
This KAYAK deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1812:30 pm
ISP
-
LHR
1 stop13h 35m
Multiple Airlines
Fri 10/238:10 pm
LHR
-
ISP
1 stop19h 55m
Multiple Airlines
Deal found 7/3$1,534

Find flight deals from Islip to London

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$809
(Norse)

Popular in

June

Cheapest in

September

Average price

$707
Provider with most accurate pricing for Islip Long Island-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Islip Long Island-London (LON) flights.
Search Deals
From Islip Long Island to London (LON)
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($160 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2026.
Use the filters below to find and compare flights from Islip to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Mon 8/17

10:57 am-10:00 am

1 stop18h 03m

London Gatwick

Mon 8/24

2:00 pm-9:53 am

1 stop24h 53m

$809

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Tue 8/11

5:27 pm-10:00 am

2 stops35h 33m

London Gatwick

Tue 8/18

2:00 pm-9:53 am

1 stop24h 53m

$823

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Mon 7/27

10:57 am-10:00 am

1 stop18h 03m

London Gatwick

Mon 8/3

2:00 pm-1:42 pm

2 stops28h 42m

$996

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Mon 7/27

4:48 pm-9:35 am

2 stops35h 47m

London Gatwick

Mon 8/3

12:20 pm-9:44 pm

2 stops38h 24m

$1,115

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Mon 8/3

6:00 am-6:30 am

2 stops19h 30m

London Heathrow

Tue 8/4

8:40 am-10:40 am

2 stops31h 00m

$1,173

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Sun 7/26

6:00 am-6:30 am

2 stops43h 30m

London Heathrow

Sun 8/2

8:40 am-12:38 pm

2 stops56h 58m

$1,223

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Sun 10/18

2:00 pm-8:45 pm

2 stops49h 45m

London Heathrow

Fri 10/23

8:40 am-1:05 pm

2 stops33h 25m

$1,262

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Mon 8/17

2:16 pm-6:45 am

1 stop11h 29m

London Heathrow

Mon 8/24

9:25 pm-9:53 am

2 stops41h 28m

$1,295

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Tue 8/11

1:35 pm-8:20 pm

2 stops25h 45m

London Heathrow

Tue 8/18

2:20 pm-11:28 pm

2 stops38h 08m

$1,492

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Mon 7/27

11:31 am-1:30 pm

2 stops20h 59m

London Heathrow

Mon 8/3

7:40 am-11:53 pm

2 stops21h 13m

$1,523

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

Compare providers for flights from Islip to London

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to London in July.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Islip, New York-London flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-London flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-London flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-London flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Islip to London

Have a flexible travel schedule? Discover the best time to fly to London from Islip with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Islip to London
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Islip to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Islip to London?

    For a flight from Islip to London, you will be flying from Long Island. Islip Long Island (ISP) is just 7.2 mi from the center of the city. Long Island is the only Islip airport and it handles 0 outbound flights to London per day. 0 airlines have flights to London from Islip Long Island on a regular basis.

  • How long is the flight from Islip, New York to London?

    Departing from Islip, New York to London will take you 19h 30m. The distance between Islip, New York and London is about 3406 mi.

  • Can I find deals for flights from Islip to London that include hotel bookings?

    Yes. In addition to deals on Islip to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to London.

  • Can I find deals for business class flights from Islip to London?

    Yes. Cheapflights offers flight deals from Islip to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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